Optical instrument.



G4 REISINGER.

OPTICAL INSTRUMENT.

APPLICAHON FILED MAR. 23, m1.

1,267,592. Patented May 2%, 1918.

2 SHEETS---SHEEY l.

G RElSINGER.

OPTICAL INSTRUMENT.-

APPLICATON FILED MAR. 23. mm.

1 ,267,592. Patented May 28, 1918.

2 SHEETS SHEET 2.

Email-,3

UNITED STATES PATENT OFFICE.

GEORGE REISINGER, OF ROCHESTER, NEW YORK, ASSIGNOR TO CROWN OPTICAL COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION.

OPTICAL INSTRUMENT.

Specification of Letters Patent.

Patented May 28, 1918.

To all whom it may concern:

Be it known that I, GEORGE RnIsINonR, a subject of the Emperor of Austria-Hungary, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Optical Instruments, of which the following is a specification.

The present invention relates to optical instruments, and more particularly to the type which employs reflecting prisms, an obj ect of this invention being to provide a holding or securing means for the prisms adapted to permit the ready adjustment of the prisms upon their seats without imposing any strains on the prisms tending to distort or fracture the same.

To this and other ends, the invention consists of certain parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings Figure 1 is a sectional view through a por tion of the casing of a binocular telescope, showing two prisms therein with the adjusting means therefor;

Fig. 2 is a section on the line 2-2, Fig. 1;

Fig. 3 is a top view of the construction shown in Fig. 1;

Fig. 4 is a detail perspective view of one of the saddle members of the upper prism;

Fig. 5 is a detail perspective view of the lower saddle member, showing the cooperation thereof with its prism;

Fig. 6 is a detail perspective view showing a modification of the saddle of the upper prism;

Fig. 7 is a top view, similar to that shown in Fig. 3, showing the modification illustrated in Fig. 6;

Fig. 8 is a sectional view of still another embodiment of the invention; and

Fi 9 is a perspective view of the saddle mem er illustrated in Fig. 8.

In binocular telescopes it is customary to employ on each half of the instrument, a pair of prisms one arranged above the other, the upper one optically connecting with the objective and the lower one optically connecting with the eyepiece. To the end that the images received by the two eyepieces of the binoculars will be coincident to produce a stereoscopic effect, it is customary to mount the prisms in such a manner that they may be shifted in order to bring the two images in coincidence, this adjustment correcting the many errors in the optical parts of the instrument as well as in the mounting of such parts. In effecting adjustments of the prisms it is desirable that both of the prisms be shiftable longitudinally, and at least one of the prisms have provision for a lateral movement.

Considerable difliculties have been met with in holding the prisms to their seats in such a manner that they will not be shifted under a jarring action, and at the same time strains or stresses will not be produced in the prisms tending to distort the same or cause a fracture thereof. These difficulties have been overcome by the present improve ments.

In the embodiment of the invention shown in Figs. 15 two forms of the adjusting and holding means are employed, one permitting only a longitudinal movement of the prism, while the other permits both a longitudinal and lateral or transverse movement. Both of these forms have a common principle of operation. Referring first to the means for securing the lower prism 1 to its seat 2, it embodies a saddle preferably formed from a single piece of metal and adapted to cooperate with the two angularly arranged faces of the prism as well as with the apex and the opposite side faces of the prism. This saddle has a central portion 3 bearing against the apex, and having at opposite ends laterally turned portions 4 for cooperating with the opposite side faces of the prism 1. Also provided on opposite sides of the central portion 3 are two pairs of resilient or spring arms 5 whose ends are deflected laterally at 6 and beveled at 7 to cooperate with the angularly arranged faces of the prism 1. Spring arms 8 are extended in opposite directions from the saddle, and carry at their extreme ends screw members 9'preferably in the form of nuts, the arms 8 being preferably bent or deflected laterally toward the prism seat, so that the axis of the nut or screw portion 9 will intersect the plane of the prism seat.

engaged by two screw members 10, the'axes of which converge and intersect the plane of the prism seat. These screw members '10 are preferably mounted to turn in a part These nuts 9 are 1 formed in the casing12, so that they have 1 fixed with reference to the prism seat as, for instance, in engagement with the walls 11 of openings, formed. in the casing 12 of the.

instrument, the mounting-of the screw being such that the latter may turn freely, but does not move axially.

By the foregoing arrangement theprism 1 may be moved in the direction of the length of its seat by adjusting or turning the screws 10, the idth of the seat being substantially equal to the width of the prism so that the latter is held against lateral movement. At the same time the screws cooperate with thescrewpartson the saddle insuch amanner as to firmly hold the prism 1 to itsseat. The nuts or screw parts 9 being supported by the spring arms 8 are permitted to shift slightly, while at the same time the screws may have a slight rocking movement in engagement with the walls 11 of the openings. The prism is engaged by portions on thesaddle which are resiliently mounted, and these portions connect with the prism near the edge of the latter, where the strains, if produced, are less likely to aifect the optical action ofthe prism.

, The adjusting means for the upper prism 13 comprises a saddle form of two members, each member being a duplicate of the other and comprising preferably a central portion 1d lyingon one side of the prism and connecting two portions 15 which engage the angularly arranged faces of the prism, en gagement with the prism being established by means of ribs 16 pressed up from the metal of which the saddle member isformed. In order that the two portions-15 maybe relatively -movable to adapt. themselves to the surfacesof the two angularly arranged faces, the central Portion 14: is provided with slots 17, Each saddle rnember preferably has two oppositely extending spring arms, 18 at the freeends of which are mounted screw members 19 in theform of nuts. The nuts 19 are in turn engaged by screws 20, the axes of which converge and intersect the, plane of the prism seat 21 and also intersect the longitudinal axis of the prism. These screws20 turn loosely in en;

gagement with the walls 22 of openings free rotary or turning movement, but at the same time donot move axially. Aslight rocking action of the screws in the casing 12 is provided to permit the screws to adapt themselves to the shifting of theprism. on 'its seat,

By the arrangement shown adjusting the upper prism, the latter may be shifted longitudinally and also laterally, the longi-v tudinal movement being effected by loosening thepair of screws at one end of the prism, while tightening the pair atthe opposite end ofthe prism, andlateral movement of the prism being effected by producting the free shifting .being wider-than the prism to permitthe adjustment. This construction also draws the prism firmly to its seat, while permitof the prism upon its Seat; 7 Instead ofemploying four screws, two at each end of the prism, for eifecting the longitudinal and lateral movements of the prism l3 on its seat, three screws may be employed for this. purpose, as shown ,in Figs. 6 and 7. In. this latter. construction, the saddle member hasta central portion 23 with a pairof laterally turned'and beveled projections 2 1 and 25 at opposite sides there -of for cooperating with the twoangularly arranged faces'of the prism 13, and it also has laterally: turned projections 26 on oppo site sides for cooperating with the opposite sides of the prism 13. On one side of the central portion 23 a springarm 27 is pro jectedhaving a nut 28 at itsfree end for engagement by a screw 29 mounted to turn loosely inthe casing 12, while'on-the oppo site side of the central portion23 two diverging spring arms 30 and .31 are arranged and carry nuts 32 and 33 at their free ends for engagement, respectively, by screws 34.- and 35, whose axes intersect the plane of the prism seat and also aplane-perpendicu lar to the prism seatextending in. the direction of the longitudinal axis ofthe prism.

Another form for the adjustment for the upper pr sm is shownin Figs. 8 and 9, the saddle in this, form being in one piece and having four adjusting screws. Y In, this form 36 indicates a central portion which cooporates with the apex of the prism and con- 11ects s1de' pieces 37 cooperating with; the opposite sidesof the prism and with the angular faces of the prism. Springarms 38 are arranged inpairs on opposite sides of the saddle, the; members on each side converging towardtheir free ends and carryingnuts'39h With these nuts the screws 40 engage, sai d screws turning andI also ranged faces of the prism. This meanscara r1es screw members preferably in the-form of nuts and resiliently supported. These nuts are engaged by screw members mounted 011 a part fixed relatively to the prism seat, said screw members being mounted to rock on such part, but not to move axially. The axes of these screw members intersect the plane of the prism seat, and thus tend to pull the prism toward the seat. In some forms the axes of the screw membersalso are arranged angularly with reference to a plane perpendicular to the prism seat and extending in the direction of the length of r the prism, so that the screw members also tend to pull the prism laterally on the seat at the same time that the prism is being drawn toward the seat.

What I claim as my invention and desire to secure by Letters Patent is 1. In an optical instrument, a prism seat, a prism supported on said seat and having angularly arranged faces, means cooperating with both of said faces, two screw parts mounted on said means at opposite ends of the prism to move with said means, two screw parts mounted on a part fixed relatively to the prism seat and cooperating with the first named screw parts to move the prism in opposite directions.

2. In an optical instrument, a prism seat, a prism supported on the seat and having angularly arranged faces, a saddle cooperating with said oppositely arranged faces, and having two screw parts mounted thereon near opposite ends of the prism to move with the saddle, and two screw parts mounted on a part fixed relatively to the prism seat.

3. In an optical instrument, a prism seat, a prism supported on the seat and having two angularly arranged faces, a saddle cooperating with said faces and provided with two screw parts, and two oppositely extending screw parts mounted to move with the saddle engaging said screw parts on the saddle and mounted to turn freely in a part fixed relatively to the seat.

4. In an optical instrument, a prism seat, a prism supported on said seat and having two angularly arranged faces, a saddle cooperating with said faces and provided with two nuts on opposite sides thereof to move with the saddle, and two oppositely extending screws mounted to turn freely in a part fixed relatively to the prism seat and engaging said nuts.

5. In an optical instrument, a prism seat, a prism supported on said seat and having two angularly arranged faces, a saddle cooperating with both of said faces, two screw parts carried by the saddle near opposite ends of the prism, and two screw parts mounted to rotate 0n a part fixed relatively to the prism seat and cooperating with the screw parts on the saddle, said last named screw parts having their axes of rotation at angles to the plane of the prism seat,

6. In an optical instrument, a prism seat, a prism supported on said seat, a saddle cooperating with said prism, and means for adjusting the prism on its seat comprising two nuts resiliently supported on the sad dle, and two oppositely extending screws cooperating with said nuts and mounted to turn loosely and also to rock in a part fixed relatively to the seat with their axes extending at angles to the plane of said seat.

7. In an optical instrument, a prism seat, a prism adjustable thereon, having angularly arranged faces, means cooperating with said angularly arranged faces of said prism, and two pairs of screws, one pair being arranged at one end of said prism and cooperating with said means and the other pair being arranged at the opposite end of the prism and cooperating. with said means to adjust the prism laterally on its seat.

8. In an optical instrument, a prism seat, a prism having angularly arranged faces and adjustable longitudinally and also transversely of said seat, a saddle engaging said angularly arranged faces, and means for adjusting the prism embodying a pair of adjusting screws arranged at one end of the prism and cooperating with said saddle to adjust the prism laterally on its seat.

9. In an optical instrument, a prism seat, a prism having angularly arranged faces and adjustable longitudinally and also transversely of said seat, a saddle engaging said angularly arranged faces, and means for adjusting the prism embodying a pair of adjusting screws arranged at one end of the prism and cooperating with said saddle, said screws having their axes arranged at an angle to each other.

10. In an optical instrument, a prism seat, a prism having angularly arranged faces and adjustable longitudinally and also transversely of said seat, a saddle engaging said angularly arranged faces, and means for adjusting the prism embodying a pair of adjusting screws arranged at one end of the prism and cooperating with said saddle, said screws having their axes arranged at an angle to each other and to the prism seat.

11. In an optical instrument, a prism seat, a prism having angularly arranged faces and adjustable longitudinally and also transversely of said seat, a saddle engaging said angularly arranged faces, and means for ad usting the prism embodying a pair of adjusting screws arranged at one end of the prism and cooperating with said saddle, said screws having their axes arranged at an angle to the prism seat.

12. In an optical instrument, a prism seat, a prism having angularly arranged faces and adjustable longitudinally of the seat, a saddle cooperating with the angular faces of the prism and carrying a screw member, and

mafn for gidjustifig the prismembodying a s rewm mber 'ifi nt on a part fixe relatively to the'j grisin' seat and having-its] ax'is ifit't'sctiii "'ei prisih sezt, said screw membi lig' Qeld algztifi'st movement iIithdirtidh Ofitsi' diziah v V 13. 1111a: dptical in trument; a} prism seat, a rim having a gularl rrangea'iaces 5m adjiitable longitudinally and. trails versely 6f th seatyand ihe'ans fo'f'adjii'stihg ifig said screw m mbers suppb'rtdbn thev 14, In ah ptical instfil inent, a prism seat, a-"piis'ni silijpbttd 011' Said seat and having two a gularly armnged faces, a saddle do opiatihg w ith said faces, two pairs pf screw member's arran ed o said s' a ddle and two pairs of coap m'ifigjserew member's mounted on; apart fixed with referngje toth'e 'Se'ht, said two pairs of ci'w 'min'bers being; atfan'gd at bppqsitj ends of the pjism and the members bf eaichpair having their axes converging; j 1

15.7111 an uptical instrument, it prism'sat', a; pri's'r'n supported on Said 'sedt andhaving 3W6 angifla'ilyj a ranged facs5'ahd ma'hs for operating scre pafts; ol'iecd riifictefd' td the rism to move thr ewi'thignd the; other n'iduhtedbn a part 'fifzijed wimr eference to djiis'tih'g said prism eiiibddyifig two co Hieprism xt' ana having its axis zit n 1 8-; In an optical instrument a prism seat; pr'is'iiysfippofted" on the seat andihavin aihfgulafly ari'tiiged fac's, a saddle for the pfism aving op ositely xtendi'n' spring arms" engaging each of the" Lhgu arlyarfaiiged' fatc', and means coiiperatirig' with the Saddle for adjiistirigthe prisin'.

"19. 111 an optical 'instrilmnt, a, prism seat, snppoft dbn' the? 'sztt and having angulafly arranged fades; zfl'saddl f0]: the p sm h ving pp s l'y extending Spring aiiif s"prbi?idedj with; huts and; screws engaging said' Iiiits t0 adjust the prism on its 'at. I

GEORGE R ISINGER.

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